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Re: [Qemu-devel] [PATCH 1/5] i386: Add support for IA32_PRED_CMD and IA3
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH 1/5] i386: Add support for IA32_PRED_CMD and IA32_ARCH_CAPABILITIES MSRs |
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Date: |
Tue, 26 Jun 2018 11:20:23 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 |
On 26/06/2018 10:58, Robert Hoo wrote:
>> This is not needed, because pred_cmd is write only and arch_capabilities
>> is read only. The guest cannot modify any of them.
>>
> Thanks Paolo. Yes, indeed unnecessary.
> I looked into the
> 336996-Speculative-Execution-Side-Channel-Mitigations.pdf again, looks
> like the vmstate_spec_ctrl is similar to pred_cmd, wirte only. Shall I
> remove it as well in v2 patch?
No, spec_ctrl is read-write.
Paolo
- [Qemu-devel] [PATCH 0/5] Add Icelake CPU model, Robert Hoo, 2018/06/25
- [Qemu-devel] [PATCH 2/5] i386: Add CPUID bit and feature words for IA32_ARCH_CAPABILITIES MSR, Robert Hoo, 2018/06/25
- [Qemu-devel] [PATCH 4/5] i386: Add CPUID bit for WBNOINVD, Robert Hoo, 2018/06/25
- [Qemu-devel] [PATCH 5/5] i386: Add new CPU model Icelake-{Server, Client}, Robert Hoo, 2018/06/25
- [Qemu-devel] [PATCH 3/5] i386: Add CPUID bit for PCONFIG, Robert Hoo, 2018/06/25
- [Qemu-devel] [PATCH 1/5] i386: Add support for IA32_PRED_CMD and IA32_ARCH_CAPABILITIES MSRs, Robert Hoo, 2018/06/25